Blade Barrier

Evocation [Force]
Level: Good 6, War 6
Components: V, S
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Effect: Wall of whirling blades up to 20 ft. long/level, or a ringed wall of whirling blades with a radius of up to 5 ft. per two levels; either form 20 ft. high
Duration: 1 min./level (D)
Saving Throw: None or Reflex negates; see text
Spell Resistance: Yes
Spell Points: 11

An immobile, vertical curtain of whirling blades shaped of pure force springs into existence.

Any creature passing through the wall you conjure takes 11d6 points of force damage, with no saving throw. If you evoke the barrier so that it appears where creatures are, each creature takes damage as if passing through the wall, but each such creature can avoid the wall (ending up on the side of its choice) and thus take no damage by making a successful Reflex save. A blade barrier provides cover (+4 bonus to AC, +2 bonus on Reflex saves) against attacks made through it.

Augment: Every additional spell point spent on this spell increases its damage by one die (d6).